Electric coffee grinder



FIG. 1 is a front, right side, perspective view of an electric coffee grinder showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in FIG. 1 depict portions of the electric coffee grinder that form no part of the claimed design. 

CLAIM The ornamental design for an electric coffee grinder, as shown and described. 